【推荐1】The first glass factory ________(start)in Jamestown, Virginia by the time his great grandfather settled down there in 1907. (所给词的适当形式填空)

【推荐2】Usually the new term ________ (start) on August 29th.(所给词的适当形式填空)

【推荐3】The China-Laos Railway, a landmark project connecting Kunming in southwest China’s Yunnan Province with the Laotian capital, Vientiane, ________ (start) operation on Dec 3. 2021. （所给词的适当形式填空）

【推荐1】The policeman in the stairwell waited for his colleagues________(come) up the stairs. (所给词的适当形式填空)

【推荐2】Doctors always advise us ________ (drink) plenty of water to stay healthy. （所给词的适当形式填空）

【推荐3】I have a lot of homework ________ (do), so I'm afraid I can't go to the cinema with you. （所给词的适当形式填空）